Description of problem: DM-ioctl structure on 32bit on i386 arch has size 308 bytes, on x86_64 312 bytes. Some dm ioctl can then fail because of align check in kernel: /dmsetup.static.32.rhel -vv message mpath 0 fail_if_no_path dm version OF [16384] dm message mpath OF fail_if_no_path [16384] device-mapper: message ioctl failed: Invalid argument Command failed Because dm processing uses own code to checks validity of ioctl struct, fix can be backported without changing kABI.
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
in 2.6.18-64.el5 You can download this test kernel from http://people.redhat.com/dzickus/el5
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2008-0314.html